Photo 1 of 6pcs HONKID Glass Tube 120mm Thick Borosilicate Glass Tubes Smooth Interior with Cleaning Brushes Heat & Acid Resistant for Lab Use

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Photo 1 of 6pcs HONKID Glass Tube 120mm Thick Borosilicate Glass Tubes Smooth Interior with Cleaning Brushes Heat & Acid Resistant for Lab UsePhoto 2 of 6pcs HONKID Glass Tube 120mm Thick Borosilicate Glass Tubes Smooth Interior with Cleaning Brushes Heat & Acid Resistant for Lab Use